Axillary artery
From Tardis Wiki, the free Doctor Who reference
A medic in West Berlin was unable to find the Fourth Doctor's axillary artery, (PROSE: Checkpoint [+]Loading...["Checkpoint (short story)"]) due to the Doctor's binary vascular system. (TV: Spearhead from Space [+]Loading...["Spearhead from Space (TV story)"], et al.) This troubled the medic. (PROSE: Checkpoint [+]Loading...["Checkpoint (short story)"])
